This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
In simple cases, occurring in weakly children, and continuing after preventable causes have been removed, the vinum ferri is a mild but very useful astringent tonic, which is often sufficient both to stay the discharge, and to prevent its recurrence. In more serious cases of chronic mucous diarrhoea with slimy, bloody, offensive stools, and tenesmus, whether met with in adults or in children, the best preparation is the liquor ferri pernitratis, in doses of from 1 to 5 drops, as originally recommended by Neligan, and I have seen also much benefit from its use in the colliquative diarrhoea of phthisis. Dr. Graves specially advised it in the "nervous diarrhoea" which is liable to occur from emotional causes, and is more frequent in women: in cases with nausea and impaired appetite, calumba may be well added to the iron (British Medical Journal, ii., 1870; Dr. Cooke).